22. What is Bio-compostable? Biodegradable Compostable Bio-compostable Biodegrades: 1 to 1000 years Biodegrades: in 90 days in a compost facility Biodegrades: in 90 days in fertile soil ASTM D6400-04 Products that disappear in fertile soil. What’s left behind is SAFE… plant fertilizer! Compostability Study Pictures: ASTM D6400-04 compliant Unimproved Dirt Wheatware TM Compost Test Blocks